Weather in Grantsburg, IL
Updated 2026-09-26 11:00 local time · ZIP codes 62943
Overcast
No government weather alerts were returned for this location at the latest update.
Next hours
69°9% rain69°9% rain72°9% rain72°9% rain74°9% rain74°9% rain73°9% rain72°9% rain
69°10% rain67°10% rain66°10% rain68°10% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Key weather changes ahead
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 10%).
It feels like 63°F with winds near 7 mph.
69°F, 9% rain chance and 7 mph wind.
Visibility is around 6 mi; gusts may reach 10 mph.
Current temperature is 69°F, wind 7 mph, rain chance up to 10%.
UV index is 4. Sunscreen and sunglasses are sensible for longer outdoor time.
Local weather characteristics in Grantsburg
Illinois has four distinct seasons with hot, humid summers, cold winters, strong frontal changes and frequent spring and summer thunderstorms.
Grantsburg is part of the Midwest weather region. The forecast point is near 37.39°N latitude and 88.75°W longitude. Local temperature, wind and precipitation can still differ from nearby places, especially where terrain, coastlines or urban development create small-scale weather changes.
Grantsburg weather today
Overcast and 69°F in Grantsburg, IL. Today's high is 74°F with a 8% rain chance. Winds are around 7 mph with gusts near 8 mph. Relative humidity is 29%, pressure is 30.13 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Grantsburg
Sunrise is at 06:46 AM and sunset is at 06:46 PM. Tomorrow's forecast calls for Overcast with a high near 82°F and a low near 60°F. The maximum rain chance is 17%.